Re: [PSUBS-MAILIST] Re: Increasing pressure inside hull

[jbarlow@bjservices.ca]

      I think that I wasn't clear in my question.  I didn't really have any
intention of doing this, just wondering about the possibility of building
the ability to do so in.   I was thinking about the possibility of going
over depth or to overcome a leak in the hull, knowing that after the
emergency you would have to decompress.  As a submarine could be a mobile
decompression chamber I thought that would be covered.I was also curious as
to what the Max pressure people have been subject to (air, HeO, or other
gasses included).

     I can't remember the name of the course and would have to look at the
dive charts to see.  I haven't gone diving at all recently.  The course
covered Nitrogen Narcosis, Decompression Sickness (Bends), but didn't say
more than the effects that would be experienced, and didn't cover diving
gasses at all. I know people that dive regularly to 130' - 160' but I am
not one of them nor do I wish to be.  Due to that I was thinking that the
NAVY or PADI or ... dive charts are probably quite conservative and could
in an emergency be exceeded while staying inside the pressure hull and you
could make a  safe and controlled assent while decompressing within the
submarine hull.  I guess it would be unnecessary because any leak would
either be too small to worry about or too large and rapid to do anything
about.

     Now it is purely an academic question about what the human body can or
has withstood if anyone knows.


Jay.




                                                                                                                                
                    Subscuba@aol.com                                                                                            
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                    @psubs.org                        Subject:     Re: [PSUBS-MAILIST] Re: Increasing pressure inside hull      
                                                                                                                                
                                                                                                                                
                    05/10/2002 06:26 AM                                                                                         
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                    personal_submersibles                                                                                       
                                                                                                                                
                                                                                                                                




Jay,

For what it's worth, I wrote a number of programs that shows the problems
with exposure to higher ambient pressures. It is basically a decompression
program. I wrote a number of them based on the math models behind the US
Navy
dive tables as well as a few of the dive computers on the market. I can
send
them to you if you are interested. If you actually use them do so at your
own
risk.

If your SCUBA course glossed over the effects of pressure, it sounds like a

poor course. PADI?

Ken Martindale